Investigating hyponatraemia

In the opening section (“The patient”) of this Rational Testing article by Ammar Wakil and colleagues (BMJ 2011;342:d1118, doi:10.1136/bmj.d1118) the units for the serum creatinine concentration were wrong: the text should have said “creatinine 55 µmol/L (51-107 µmol/L)” [not 55 mmol/L (51-107 mmol/L)].